Hermann protze



UNITED STATES PATENT. OFFICE.

HERMANN PROTZE, or ELBERFELD, PRUSSIA, GERMANY.

PRESERVING VACCINVE.

SPECIFICATION forming part of Letters Patent No. 273,390. dated March 6, 1833,

Application filed December 20, 1882. (No specimens.)

' method of treatingand preserving vaccine by mixing it with glycerine and thymol.

To one part of freshly-obtained vacciueis added one part of pure glycerine and one part of an aqueous solution of thymol, which parts are carefully mixed together. The solution of thyinol is obtained by dissolving seventy-five one-thousandths part of thymol in one hundred parts of distilled water, (thymoli 0.075, aquee distillate 100.0.)

The mixture thus obtained is kept in a cool dark place, andjafter three hours it is filled into capillary tubes,which areimmediately sealed by the spirit-flame.

Vaccine so preserved can be used three months after its preparation, while ordinary vaccine without any addition spoils in a few days.

In place of thymol, any other equivalent substance having the same preservative properties may be employed.

I am aware that a solution of thymol, alcohol, water, and glycerine has been used, in dressing wounds; but this differs from my invention both in substance and purpose.

Having thus described myini'entionl claim as new and desire to secure by Letters Patent- As a new product, the compound herein described, consisting of vaccine, thymol, glycerine, and water, as and for the purpose set forth.

- In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERMANN PROTZE.

Witnesses: v

CARL FRAWEIN, KARL VON DER HEYDT. 

